Constructed from alloy material to hold up for long time. The erhu fine tuner is easy to install, and not hurting strings, it is helpful to the sound quality of erhu. Good replacement parts for erhu, a very useful music instrument accessory for your practicing and playing. Features -Color:Black -Material:Alloy -Size:6.90X6.20X5.20cm/2.71X2.44X2.04in - Alloy material, not easily to break or deform, durable for use, long serving life. - This erhu string adjuster is very excellent DIY maintenance tools for erhu lovers. - Excellent craftsmanship details will ensure its durability and practicality. It will serve you well. - With this erhu string adjuster, when playing, the strings are more stable to achieve noise reduction. - Mainly used to help you adjust and improve the sound of strings, so that your instrument has a better sound quality. Package list: 2 x Erhu Tuner